Re the filler cap. Mine was a b###h to get off and replace. The dealer sorted it by a small filing away of a corner. It's now perfect.
As for the space beneath the filler cap, on my Plus Four you can't get at it. I have the spare wheel and the void beneath it is sealed off with a plastic panel. I had to remove this to access the wiring for the ". Cobra's head "high brake light wiring to mod it for a removable extension to fit onto a case on the rack. It was a tight fit and a fiddle.
In theory an access hatch could be made and that would help access or a tank extension to increase capacity.
The rule of thumb guide is to refuel at about 250 miles as there is still a safety volume in the tank. I've been told 70 miles when the warning light comes on but my guess is that's too close! I've done 290 miles and the gauge ( when steady on level-ish ground) was on empty. No coughs/splutters from the engine. I believe the Plus Six is similar. Long run? Brim the tank. Gauge only starts to drop after about 100 miles then a steady drop.Warning light
It is a bit like being in an EV with range monitoring/anxiety but easier refuelling!.

Last edited by sospan; 24/01/25 10:36 AM.

Plus Four MY23 Furka Rouge